Adjustable mold for making building-blocks.



PATENTBD NOV. 28, 1905 J. B. FRANCISCO. ADJUSTABLE MOLD FOR MAKINGBUILDING BLOCKS.

APPLICATION FILED APBNM, 1905.

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Rm 0 9 1 0m 2 APPLICATION FILED APE.24, 1905.

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/N VENTOI? JOSEPH B. FRANCISCO, OF COLUMBUS. OHIO.

ADJUSTABLE MOLD FOR MAKING BUILDING- BLOCKS- Specification of LettersPatent.

Patented Nov. 28, 1905.

Application filed April 24, 1905. Serial No. 257,131.

To all whom it may concern.-

Be it known that I, JosEPH B. FRANoIsoo, a citizen of the United States,residing at C0- lumbus, in the county of Franklin and State of Ohio,have invented certain new and useful Improvements in Molds for theManufacture of Concrete Building-Blocks, of which the following is aspecification.

My invention relates to certain new and useful improvements in molds forthe manufacture of concrete building-blocks, in which the sides areadjustably hinged to arms attached to the bottom in such a manner as toadapt the mold to the manufacture of various sizes of blocks. The bottomis provided with rockers to facilitate rolling the filled mold on itsside preparatory to opening, and the sides are adapted to receive falsesides by which the size of the block may be increased at will, as isfully illustrated in the accompanying drawings, in which- Figure 1 showsthe mold closed ready to be filled. Fig. 2 shows the mold rolled over onits side preparatory to opening. Fig. 3 shows the mold opened exposingthe finished block. Fig. 4 is a detail of the core used to produce thehollow in the blocks. Fig. 5 shows the mold with false sides in placefor the manufacture of long blocks.

Like numerals refer to like parts in the various views.

The arms 1 and 2 have on their upper sides the slots 6 to receive theprojections 11 of the bottom 7 and are secured there by the screws 12.Mounted on these arms 1 and 2 are slid ing blocks 3 and 4, which have ontheir upper surface the lugs 5. The sides 8 and 9 are provided with theribs 10, the lower ends of which engage the lugs 5, forming hinges bywhich the sides 8 and 9 are adjustably connected with the arms 3 and 4and through them with the bottom 7. Cast integral with the bottom 7 arethe rockers 14, which are designed to rest on suitable planks or a track13, allowing the mold to be readily tipped on its rear side 8preparatory to opening. The

arms 1 and 2 are entirely free from any support, except that the forwardends engage the cross -pieces in which the planks 13 rest, therebypreventing the mold from rolling forward while being filled.

In the process of making a block the sides 8 and 9 are adjusted to fitthe bottom 7 and the ends 16 are securely held in place by the clamps18. The cleats 17 are attached to the sides 8 and 9 to prevent the ends16 from being forced out. A false lining 15, made of plank or any othersuitable material, is placed against the side 8 and the mold is filledwith concrete. If it is desired to make the block hollow, when the moldhas been partially filled the cores are inserted and thefillingcontinued. After filling the mold is rolled over on its rear side8 by means of the rockers 14, the clamps 18 are removed, the side 9 isswung back against the arms 1 and 2, and the bottom 7 is rocked back toits normal position, exposing the casting, which may be lifted to oneside by means of the false lining 15. When it is desired to make longblocks, the false sides 20 21 and false bottom 22 are inserted in themold and secured to the sides 8 and 9 and the bottom 7 by the screws 23.These false sides are provided with a multiplicity of slots 24, spacedat desirable intervals to receive the ends 16, forming a mold of anydesired length.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A mold for the manufacture of concrete building-blocks, having abottom supported by rockers, having arms secured to said bottom on whichthe side plates are slidably hinged, substantially as set forth.

2. A mold for the manufacture of concrete building-blocks having abottom supported by a rocker, arms attached to said bottom;

sides slidably hinged to said arms, and false sides secured to said sideplates; false bottom 22 secured to bottom 7, substantially as set forth.

3. A mold for the manufacture of concrete building-blocks, having abottom supported by rockers, arms attached to said bottom, side platesslidablyhinged to said arms, false sides secured to said side plates; amultiplicity of slots for the reception of end plates spaced atdesirable intervalsalong the false sides substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH B. FRANCISCO.

Witnesses:

PEARL FRANCISCO, A. E. BRUCE.

